An outer tooth forming die for a toothed sleeve

Abstract

The utility model relates to tooth profile screw sleeve processing technical field especially relates to a tooth profile screw sleeve's external tooth forming die, including upper die assembly, lower die assembly and ejector pin, the upper die assembly includes upper die plate, upper fixed plate, push tooth cutter and die handle, the upper fixed plate installs on the lower end surface of upper die plate, the upper end of push tooth cutter installs in the center hole of upper fixed plate, the die handle is connected with upper die plate, the lower die assembly includes lower die plate and female die plate, the female die plate sets up on the top surface of lower die plate, the center of female die plate is provided with workpiece placing hole, is used for vertical placement tooth profile screw sleeve of waiting for processing, the ejector pin passes through die handle, upper die plate in proper order from top to bottom after then stretches into the center hole of push tooth cutter. This external tooth forming die has overcome the problem of complicated workpiece clamping operation and dismounting operation in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of toothed thread sleeve processing technology, and in particular to an external tooth forming mold for toothed thread sleeves. Background Technology

[0002] Combination Figure 1 and Figure 2 The diagram shows a schematic of a toothed threaded sleeve. The head of this sleeve has external teeth. Currently, the common methods for machining external teeth are using a gear shaper or milling, which suffers from low machining efficiency. To improve machining efficiency, a method using a tooth-pushing cutter has emerged. For example, patent application CN115709312A discloses a machining device and method for blind-hole internal gears in shaft parts. The workpiece is clamped between a pressure block and a V-block, and a hydraulic press applies downward pressure to the tooth-pushing cutter, causing it to move downwards to perform the tooth-pushing operation on the workpiece.

[0003] However, the processing device in the aforementioned prior art CN115709312A uses a clamping mechanism formed by components such as a second hinge bolt, pressure plate, pressure block, V-block, first hinge bolt, second nut, second cylindrical pin, and third cylindrical pin to clamp the workpiece, which results in cumbersome workpiece clamping and disassembly operations. When performing batch processing, using the existing clamping structure to clamp the workpiece will affect processing efficiency. Utility Model Content

[0004] The main purpose of this utility model is to propose an external tooth forming mold for toothed thread sleeves, which aims to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model proposes an external tooth forming mold for toothed thread sleeves, comprising an upper mold assembly, a lower mold assembly, and an ejector pin; The upper mold assembly includes an upper template, an upper fixing plate, a pusher cutter, and a mold handle; the upper fixing plate is installed on the lower end face of the upper template; the upper end of the pusher cutter is installed in the center hole of the upper fixing plate; and the mold handle is connected to the upper template.

[0006] The lower mold assembly includes a lower mold plate and a concave mold plate; the concave mold plate is disposed on the top surface of the lower mold plate; a workpiece placement hole is provided in the center of the concave mold plate for vertically placing the toothed thread sleeve to be processed.

[0007] The push rod passes through the mold handle and the upper template from top to bottom and then extends into the center hole of the pusher cutter.

[0008] Preferably, the workpiece placement hole is a stepped through hole, including an upper hole body and a lower hole body; the diameter of the upper hole body is larger than the diameter of the lower hole body; the diameter of the upper hole body matches the outer circumferential diameter of the lower half of the toothed thread sleeve.

[0009] Preferably, the mold handle includes a clamping post, a flange plate, and an externally threaded post from top to bottom; a stepped through hole is provided on the upper template, which includes a countersunk platform, an internally threaded hole, and a lower through hole from top to bottom; the externally threaded post of the mold handle is screwed into the internally threaded hole of the upper template; the flange plate of the mold handle is installed in the countersunk platform of the upper template, and the flange plate and the upper template are fastened together by a first screw.

[0010] Preferably, a countersunk hole is provided at the center opening of the upper fixing plate; an annular limiting boss is integrally formed on the outer peripheral surface of the top of the pusher cutter; the annular limiting boss is provided in the countersunk hole of the upper fixing plate, and the top surface of the pusher cutter abuts against the lower end surface of the upper template.

[0011] Preferably, the upper template and the upper fixing plate are fastened together by a first cylindrical pin and a second screw.

[0012] Preferably, the lower template and the concave template are fastened together by a second cylindrical pin and a third screw.

[0013] Preferably, a through hole is provided on the lower template, the axis of the through hole coincides with the axis of the workpiece placement hole, and the diameter of the through hole is equal to the diameter of the lower hole.

[0014] Preferably, the inner surface of the lower end of the pusher cutter is provided with a plurality of cutting teeth evenly distributed in a ring, and a chip removal groove is provided at the lower end of each cutting tooth.

[0015] Preferably, the inner surface of the cutting tooth includes, from top to bottom, an inner conical surface, a transition arc surface, and a cylindrical surface; the angle α between the inner conical surface and the central axis of the tooth-pushing cutter is 12 to 18 degrees.

[0016] Preferably, a guide sleeve is installed on the upper template; the upper end of the guide post is slidably inserted into the inner hole of the guide sleeve.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model of external tooth forming mold, in use, simply involves placing the toothed threaded sleeve to be processed vertically in the workpiece placement hole of the concave template. When the upper mold assembly descends, the toothed cutter completes the processing of the workpiece head into an external tooth shape; when the upper mold assembly ascends, the processed workpiece moves upward along with the toothed cutter, and is ejected from the toothed cutter by the action of the ejector rod. By adopting this external tooth forming mold, the problems of cumbersome workpiece clamping and disassembly operations in the prior art are overcome. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is the front view of the toothed threaded sleeve; Figure 2 This is a top view of a toothed threaded sleeve; Figure 3 This is a top view of the external tooth forming mold provided by this utility model; Figure 4 for Figure 3 Sectional view along the middle AA; Figure 5 This is a top view of the upper template in this utility model; Figure 6 for Figure 5 A sectional view along the middle edge BB; Figure 7 This is a top view of the upper fixing plate in this utility model; Figure 8 for Figure 7 A sectional view along the center CC; Figure 9 This is a top view of the concave template in this utility model; Figure 10 for Figure 9 A sectional view along the middle DD; Figure 11 This is a top view of the lower template in this utility model; Figure 12 for Figure 11 A sectional view along the middle of EE; Figure 13 This is a front sectional view of the pusher cutter in this utility model; Figure 14 This is a top view of the tooth-pushing cutter in this utility model; Figure 15 This is a schematic diagram of the connection between the upper die assembly of this utility model and the punch press; Figure 16 This is a schematic diagram of the tooth-pushing process performed on the external tooth forming mold provided by this utility model.

[0020] Explanation of icon numbers: 1. Upper template; 1a. Countersunk plate; 1b. Internal threaded hole; 1c. Lower through hole; 2. Upper fixing plate; 2a. Countersunk hole; 3. Guide sleeve; 4. Guide post; 5. Concave template; 5a. Workpiece placement hole; 5b. Upper hole body; 5c. Lower hole body; 6. Lower template; 6a. Through hole; 7. Third screw; 8. Push cutter; 8a. Annular limiting boss; 8b. Cutting tooth; 8c. Chip removal groove; 9. First cylindrical pin; 10. First screw; 11. Die shank; 11a. Clamping post; 11b. Flange plate; 11c. External threaded post; 12. Push rod; 13. Second screw; 14. Second cylindrical pin; 15. Punch press slide; 16. Stop block; 17. Punch plate; 100. Toothed threaded sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0024] Combination Figures 3 to 14 As shown, a toothed thread sleeve external tooth forming mold includes an upper mold assembly, a lower mold assembly, and an ejector pin 12.

[0025] The upper mold assembly includes an upper template 1, an upper fixing plate 2, a pusher 8, and a mold handle 11; the upper fixing plate 2 is installed on the lower end face of the upper template 1; the upper end of the pusher 8 is installed in the center hole of the upper fixing plate 2; and the mold handle 11 is connected to the upper template 1.

[0026] Combination Figure 4 and Figure 6 As shown, the mold handle 11 includes a clamping post 11a, a flange plate 11b, and an externally threaded post 11c from top to bottom; a stepped through hole is provided on the upper template 1, which includes a countersunk 1a, an internally threaded hole 1b, and a lower through hole 1c from top to bottom; the externally threaded post 11c of the mold handle 11 is screwed into the internally threaded hole 1b of the upper template 1; the flange plate 11b of the mold handle 11 is installed in the countersunk 1a of the upper template 1, and the flange plate 11b and the upper template 1 are fastened together by a first screw 10.

[0027] Combination Figure 4 As shown, the lower mold assembly includes a lower mold plate 6 and a concave mold plate 5; the concave mold plate 5 is disposed on the top surface of the lower mold plate 6; a workpiece placement hole 5a is provided in the center of the concave mold plate 5 for vertically placing the toothed thread sleeve 100 to be processed.

[0028] Combination Figure 10 As shown, the workpiece placement hole 5a is a stepped through hole, including an upper hole body 5b and a lower hole body 5c; the diameter of the upper hole body 5b is larger than the diameter of the lower hole body 5c; the diameter of the upper hole body 5b matches the outer circumferential diameter of the lower half of the toothed thread sleeve 100.

[0029] Combination Figure 4 As shown, the push rod 12 passes through the mold handle 11 and the upper template 1 from top to bottom and then extends into the center hole of the pusher cutter 8.

[0030] Combination Figure 4 , Figure 8 as well as Figure 13 As shown, a countersunk hole 2a is provided at the center opening of the upper fixing plate 2; an annular limiting boss 8a is integrally formed on the outer peripheral surface of the top of the pusher cutter 8; the annular limiting boss 8a is disposed in the countersunk hole 2a of the upper fixing plate 2, and the top surface of the pusher cutter 8 abuts against the lower end surface of the upper template 1. By utilizing the above structure, an axial limiting structure is formed for the pusher cutter 8.

[0031] Combination Figure 4 As shown, the upper template 1 and the upper fixing plate 2 are fastened together by a first cylindrical pin 9 and a second screw 13. Further, the lower template 6 and the concave template 5 are fastened together by a second cylindrical pin 14 and a third screw 7.

[0032] Combination Figure 4 and Figure 12As shown, a through hole 6a is provided on the lower template 6. The axis of the through hole 6a coincides with the axis of the workpiece placement hole 5a, and the diameter of the through hole 6a is equal to the diameter of the lower hole 5c. If a workpiece gets stuck in the workpiece placement hole 5a, a rod can be inserted through the through hole 6a to push the workpiece out.

[0033] Combination Figure 13 As shown, the inner surface of the lower end of the tooth-pushing cutter 8 is evenly distributed with multiple cutting teeth 8b in a ring, and a chip removal groove 8c is provided at the lower end of each cutting tooth 8b. The purpose of providing the chip removal groove 8c is to facilitate chip removal. During tooth-pushing machining, the cut iron chips are discharged through the chip removal groove 8c.

[0034] Furthermore, the inner surface of the cutting tooth 8b includes, from top to bottom, an inner conical surface 8d, a transition arc surface 8e, and a cylindrical surface 8f; the inner conical surface 8d is an inverted conical surface, and the angle α between the inner conical surface 8d and the central axis of the tooth-pushing cutter 8 is 12 to 18 degrees.

[0035] Combination Figure 4 As shown, in order to ensure the stability of the relative movement of the upper mold assembly and the lower mold assembly, and to facilitate the coaxiality of the pusher cutter 8 and the workpiece placement hole 5a, a guide post 4 is installed on the lower mold plate 6, and a guide sleeve 3 is installed on the upper mold plate 1; the upper end of the guide post 4 is slidably inserted into the inner hole of the guide sleeve 3.

[0036] Combination Figure 15 and Figure 16 As shown, the working principle of the external tooth forming mold provided in this embodiment is as follows: In use, the external tooth forming die is installed on the punch press. A punch press slide 15 and a stop block 16 are installed on the punch press bed. A punch plate 17 is installed horizontally on the punch press slide 15, and there is a gap between the mounting hole on the punch press slide 15 and the punch plate 17. The punch press is a conventional existing equipment and will not be described in detail here.

[0037] Specifically, the clamping post 11a of the die shank 11 is connected to the punch press slide 15. The lower die assembly is placed on the punch press worktable, and the lower die plate 6 is pressed onto the punch press worktable (not shown in the figure) by a pressure plate.

[0038] When machining the external tooth shape of the head of the toothed thread insert 100, the toothed thread insert 100 to be machined is vertically inserted into the workpiece placement hole 5a of the concave template 5. Specifically, the toothed thread insert 100 is inserted into the upper hole 5b of the workpiece placement hole 5a. The punch press is started, and the punch press slide 15 drives the entire upper die assembly to move downward, using the tooth-pushing cutter 8 to complete the machining of the external tooth shape of the workpiece head.

[0039] After the tooth-pushing process is completed, the punch press slide 15 drives the entire upper die assembly to move upward. At this time, the finished workpiece moves upward along with the tooth-pushing cutter 8. When the top surface of the punch plate 17 abuts against the stop block 16, the punch plate 17 stops moving upward, while the punch press slide 15 continues to drive the entire upper die assembly to move upward. At this time, the punch plate 17 presses down on the push rod 12 to generate a downward thrust, pushing the finished toothed thread sleeve 100 out of the tooth-pushing cutter 8, completing the unloading operation.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A tooth-shaped threaded sleeve external tooth forming mold, characterized in that, Includes upper mold assembly, lower mold assembly and ejector pin (12); The upper mold assembly includes an upper template (1), an upper fixing plate (2), a pusher cutter (8), and a mold handle (11); the upper fixing plate (2) is installed on the lower end face of the upper template (1); the upper end of the pusher cutter (8) is installed in the center hole of the upper fixing plate (2); the mold handle (11) is connected to the upper template (1); The lower mold assembly includes a lower mold plate (6) and a concave mold plate (5); the concave mold plate (5) is disposed on the top surface of the lower mold plate (6); a workpiece placement hole (5a) is provided in the center of the concave mold plate (5) for vertically placing the toothed thread sleeve (100) to be processed. The push rod (12) passes through the mold shank (11) and the upper template (1) from top to bottom and then extends into the center hole of the pusher cutter (8).

2. The external tooth forming mold as described in claim 1, characterized in that, The workpiece placement hole (5a) is a stepped through hole, including an upper hole body (5b) and a lower hole body (5c). The diameter of the upper hole (5b) is larger than the diameter of the lower hole (5c); the diameter of the upper hole (5b) matches the outer circumferential diameter of the lower half of the toothed threaded sleeve (100).

3. The external tooth forming mold as described in claim 1, characterized in that, The mold handle (11) includes, from top to bottom, a clamping post (11a), a flange plate (11b), and an external thread post (11c). The upper template (1) is provided with stepped through holes, which include a countersunk plate (1a), an internal threaded hole (1b) and a lower through hole (1c) from top to bottom. The external threaded post (11c) of the mold handle (11) is screwed into the internal threaded hole (1b) of the upper template (1); the flange plate (11b) of the mold handle (11) is installed in the countersunk platform (1a) of the upper template (1), and the flange plate (11b) and the upper template (1) are fastened together by the first screw (10).

4. The external tooth forming mold as described in claim 1, characterized in that, A countersunk hole (2a) is provided at the center opening of the upper fixing plate (2); An annular limiting boss (8a) is integrally formed on the outer peripheral surface of the top of the pusher (8); The annular limiting boss (8a) is disposed in the countersunk hole (2a) of the upper fixing plate (2), and the top surface of the pusher (8) abuts against the lower end surface of the upper template (1).

5. The external tooth forming mold as described in claim 1, characterized in that, The upper template (1) and the upper fixing plate (2) are fastened together by a first cylindrical pin (9) and a second screw (13).

6. The external tooth forming mold as described in claim 1, characterized in that, The lower template (6) and the concave template (5) are fastened together by a second cylindrical pin (14) and a third screw (7).

7. The external tooth forming mold as described in claim 2, characterized in that, A through hole (6a) is provided on the lower template (6), the axis of the through hole (6a) coincides with the axis of the workpiece placement hole (5a), and the diameter of the through hole (6a) is equal to the diameter of the lower hole body (5c).

8. The external tooth forming mold as described in claim 1, characterized in that, The inner surface of the lower end of the pusher cutter (8) is evenly distributed with multiple cutting teeth (8b) in a ring, and a chip removal groove (8c) is provided at the lower end of each cutting tooth (8b).

9. The external tooth forming mold as described in claim 8, characterized in that, The inner surface of the cutting tooth (8b) includes, from top to bottom, an inner conical surface (8d), a transition arc surface (8e), and a cylindrical surface (8f); the angle α between the inner conical surface (8d) and the central axis of the pusher cutter (8) is 12 to 18 degrees.

10. The external tooth forming mold as described in claim 1, characterized in that, A guide post (4) is installed on the lower template (6), and a guide sleeve (3) is installed on the upper template (1); the upper end of the guide post (4) is slidably inserted into the inner hole of the guide sleeve (3).

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