A locking device for upper punch in automotive sleeve processing

Abstract

A locking device for an upper punch in automotive sleeve processing includes a locking sleeve, within which a clamping head and a clamp are nested. When the locking sleeve is screwed onto a locking seat, the clamping head and clamp move relative to each other and are clamped together. The clamping head and clamp engage with a tapered surface and a tapered hole. A mounting hole is provided at the center of the clamp, and the mounting hole matches the dimensions of the upper part of the punch. This invention provides a locking device for an upper punch in automotive sleeve processing, enabling rapid installation and improving efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive sleeve processing equipment, and in particular to a locking device for an upper punch die used in automotive sleeve processing. Background Technology

[0002] The patent application number "202222318807.2" entitled "A One-Time Forming Mold for Warm Forging of Automotive Sleeves" was filed by our company on September 1, 2022. The upper mold of this patent is consistent with the upper punch in our company's patent application number "201710240330.1" entitled "A Sleeve Processing Device and Process". In this device, after the forcing cylinder is fitted and fixed on the upper punch, the upper end of the upper punch is fixed by the punch fixing block and the punch seat, and the punch seat is then connected to the piston rod of the upper hydraulic cylinder. The above device uses multiple sets of bolts for connection and fixation. First, the installation of multiple sets of bolts requires repeated alignment and adjustment during the installation process due to the reserved installation gap, ensuring that the upper punch and lower die are aligned correctly. This increases the complexity of the installation. Moreover, during long-term stamping, if the bolts loosen, the upper punch may shift slightly again, resulting in stamping defects in the product. Second, when stamping automotive sleeves of different specifications, the punch and fixture need to be replaced entirely, which not only increases equipment costs but also requires re-adjustment and installation. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an upper punch locking device for automotive sleeve processing, which can facilitate and quickly install the upper punch (punch) and ensure alignment, thereby improving installation efficiency and reducing installation difficulty.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A locking device for an upper punch die used in automotive sleeve processing includes a locking sleeve, in which a clamping head and a clamp are nested. When the locking sleeve is screwed into a locking seat, the clamping head and the clamp move relative to each other and are clamped. The clamping head and the clamp are engaged with a tapered surface and a tapered hole. The clamp has a mounting hole at its center, which matches the size of the upper part of the punch.

[0005] The outer wall of the locking seat is provided with external threads, and a countersunk hole is opened at the lower center of the locking seat.

[0006] The locking sleeve has a cap structure and a through hole in the center.

[0007] The outer diameter of the clamp head matches the inner diameter of the through hole and the countersunk hole. A limiting ring is provided on the outer wall of the clamp head, and a tapered hole is provided in the center of the clamp head, with the large diameter end of the tapered hole facing upward.

[0008] The fixture has a frustum-shaped structure. The fixture fits into the tapered hole of the fixture head through a tapered surface. The fixture has a mounting hole in the center, and the upper end of the punch is placed in the mounting hole.

[0009] The clamp has multiple circumferential slits on its sidewall.

[0010] The lower end of the punch is provided with a square head that matches the inner hole of the automobile sleeve.

[0011] This utility model provides a locking device for an upper punch die used in automotive sleeve processing, which has the following technical advantages: 1) This application eliminates the need for multiple sets of bolted connections for installation and fixation; it directly uses a locking sleeve and locking seat threaded connection. Since the central axes of the locking sleeve and locking seat are collinear, self-alignment is achieved. Simultaneously, the upper end of the fixture head is positioned through the countersunk hole of the locking seat, and the lower end is positioned through the central hole of the locking sleeve, ensuring alignment between the fixture head and the locking sleeve and locking seat. The fixture head, fixture, and punch are nested and fitted together, achieving coincidence of their axes and self-alignment. During installation, the relative movement of the locking sleeve and locking seat threaded connection clamps the fixture within the fixture head, achieving wedge locking and clamping the punch. This ensures rapid alignment and punch locking.

[0012] 2) The locking sleeve of this device is threadedly connected to the locking seat, which realizes the locking of internal parts and the clamping of the punch. Conversely, the friction generated by the locking of internal parts and the clamping of the punch (such as the friction generated by the clamping of the fixture and the fixture head through the conical surface and conical hole, the friction of the fixture head being pressed against the locking sleeve and the locking seat, and the friction of the fixture and the countersunk hole of the locking seat) will also restrict the rotation of the locking sleeve relative to the locking seat. That is, the locking of internal parts and the clamping of the punch will also restrict the locking sleeve, reducing the risk of the locking sleeve loosening.

[0013] 3) When producing automotive sleeves of different specifications, simply loosen the locking sleeve to the desired size. Figure 9 As shown, remove the punches that are not needed, reinsert the punches that are needed, and tighten the locking sleeve. It is simple, convenient, requires no adjustment, and is quick to install. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the external structure of this utility model.

[0015] Figure 2 This is a longitudinal cross-sectional view of the present invention (locked state).

[0016] Figure 3 This is a schematic diagram of the locking seat in this utility model.

[0017] Figure 4This is a schematic diagram of the locking sleeve in this utility model.

[0018] Figure 5 This is a schematic diagram of the clamp head in this utility model.

[0019] Figure 6 This is a longitudinal cross-sectional view of the clamp head in this utility model.

[0020] Figure 7 This is a schematic diagram of the fixture in this utility model.

[0021] Figure 8 This is a schematic diagram of the installation of this utility model.

[0022] Figure 9 This is a longitudinal cross-sectional view of the present invention (initial state).

[0023] In the figure: locking seat 1, external thread 1.1, countersunk hole 1.2, mounting seat 2, locking sleeve 3, through hole 3.1, clamp head 4, limit ring 4.1, tapered hole 4.2, clamp 5, tapered surface 5.1, mounting hole 5.2, slot 5.3, punch 6, square head 6.1. Detailed Implementation

[0024] like Figures 1-2 As shown, a locking device for an upper punch die used in automotive sleeve processing includes a locking seat 1, a locking sleeve 3, a clamping head 4, and a clamp 5.

[0025] like Figure 3 As shown, the locking seat 1 is fixed to the lower end of the mounting seat 2 at the output end of the hydraulic cylinder of the punching die device. The locking seat 1 is cylindrical, and the outer wall of the locking seat 1 is provided with external thread 1.1. The lower center end of the locking seat 1 is provided with countersunk hole 1.2.

[0026] like Figure 4 As shown, the locking sleeve 3 is a cap structure, with internal threads on its inner wall and a through hole 3.1 at its center. The locking seat 1 is threadedly connected to the locking sleeve 3 via external threads 1.1.

[0027] like Figures 5-6 As shown, the clamp head 4 is cylindrical. The outer diameter of the clamp head 4 matches the inner diameter of the through hole 3.1 and the countersunk hole 1.2. The upper end of the clamp head 4 is located inside the countersunk hole 1.2 and is spaced from the top surface of the countersunk hole 1.2. The lower end of the clamp head 4 passes through the through hole 3.1. A limiting ring 4.1 is provided on the outer wall of the clamp head 4, and the limiting ring 4.1 rests on the inner bottom surface of the locking sleeve 3. When the locking sleeve 3 and the locking seat 1 are tightened, the clamp head 4 is pressed between the locking sleeve 3 and the locking seat 1 by the limiting ring 4.1. A tapered hole 4.2 is vertically provided in the center of the clamp head 4.

[0028] like Figure 7As shown, the fixture 5 has a frustum-shaped structure with a larger diameter at the upper end and a smaller diameter at the lower end. The fixture 5 mates with the tapered hole 4.2 via a tapered surface 5.1. A mounting hole 5.2 is provided at the center of the fixture 5, and the upper end of the punch 6 is placed in the mounting hole 5.2. When the fixture 5 is inserted into the tapered hole 4.2 of the fixture head 4, the upper end of the fixture 5 remains in contact with the inner top surface of the countersunk hole 1.2. Multiple circumferential slits 5.3 are opened on the sidewall of the fixture 5.

[0029] like Figure 1 As shown, the lower end of the punch 6 is provided with a square head 6.1 that matches the inner hole of the automotive sleeve. According to the production of automotive sleeves of different specifications, multiple sets of matching punches 6 are selected. The square head 6.1 at the lower end of each set of punches 6 matches the corresponding specification of automotive sleeve, while the upper end of the punch 6 remains unchanged. This facilitates universal installation without the need to replace the fixture 5.

[0030] Working principle and process: 1) For example Figure 9 As shown, during installation, first nest the clamp head 4 and clamp 5, and place them from above into the locking sleeve 3, where they are supported by the limiting ring 4.1 of the clamp head 4; then, initially screw the locking sleeve 3 upwards into the locking seat 1. Rotate the locking sleeve 3 about 2-3 turns to ensure that it does not fall off.

[0031] 2) Insert the corresponding punch 6 vertically into the mounting hole 5.2 from bottom to top, and then continue to rotate the locking sleeve 3. As the locking sleeve 3 rotates upward, it drives the clamping head 4 to move upward synchronously. The small-diameter end of the tapered hole 4.2 of the clamping head 4 gradually moves towards the large-diameter end of the tapered surface 5.1 of the clamping 5, thus squeezing the clamping 5. Since the diameter of the mounting hole 5.2 of the clamping 5 is the same as the diameter of the punch 6, and the clamping 5 has a slit 5.3, the clamping 5 can hold the punch 6 tightly after being squeezed, achieving friction locking.

Claims

1. A locking device for an upper punch die used in automotive sleeve processing, characterized in that: Includes a locking sleeve (3), in which a clamping head (4) and a clamp (5) are nested. When the locking sleeve (3) is screwed into the locking seat (1), the clamping head (4) and the clamp (5) move relative to each other and are pressed together. The clamping head (4) and the clamp (5) are connected by a tapered surface and a tapered hole. The clamp (5) has a mounting hole (5.2) at its center, which matches the upper size of the punch (6).

2. The upper punch locking device for automotive sleeve processing according to claim 1, characterized in that: The locking seat (1) has an external thread (1.1) on its outer wall and a countersunk hole (1.2) at the lower center of the locking seat (1).

3. The upper punch locking device for automotive sleeve processing according to claim 1, characterized in that: The locking sleeve (3) is a cap structure, and the locking sleeve (3) has a through hole (3.1) in the center.

4. The upper punch locking device for automotive sleeve processing according to claim 3, characterized in that: The outer diameter of the clamp head (4) matches the inner diameter of the through hole (3.1) and the countersunk hole (1.2). The outer side wall of the clamp head (4) is provided with a limiting ring (4.1). The center of the clamp head (4) is provided with a tapered hole (4.2), with the large diameter end of the tapered hole (4.2) facing upward.

5. The upper punch locking device for automotive sleeve processing according to claim 4, characterized in that: The fixture (5) has a frustum structure. The fixture (5) is fitted with the tapered hole (4.2) of the fixture head (4) through the tapered surface (5.1). The fixture (5) has a mounting hole (5.2) in the center, and the upper end of the punch (6) is placed in the mounting hole (5.2).

6. The upper punch locking device for automotive sleeve processing according to claim 5, characterized in that: The clamp (5) has multiple circumferential slits (5.3) on its side wall.

7. A locking device for an upper punch die in automotive sleeve processing according to claim 6, characterized in that: The lower end of the punch (6) is provided with a square head (6.1) that matches the inner hole of the automobile sleeve.

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