Self-centering vice capable of finely adjusting center

Abstract

The utility model provides a self-centering vice capable of finely adjusting the center, which belongs to the technical field of metal processing equipment and comprises a self-centering vice body, a left nut sliding block, a right nut sliding block, a screw rod, a screw rod seat, a limiting pin, a key, a V-shaped block, a base plate, a left screw sleeve and a right screw sleeve. Wherein the left screw sleeve and the right screw sleeve are respectively arranged in the left nut sliding block and the right nut sliding block, and the left screw sleeve and the right screw sleeve are respectively screwed on two sides of the screw rod. The screw is provided with an internal thread and an external thread, the thread pitches of the internal thread and the external thread are different, and the thread pitches are provided with a micro thread pitch difference which can be set to be 0.1 mm. The internal threads of the left and right screw sleeves are the same as the external threads on the screw rod, and the external threads on the left and right screw sleeves are the same as the internal threads on the left and right nut sliding blocks in thread pitch. According to the self-centering vice capable of finely adjusting the center, fine adjustment of the precision within 0.005 mm of the clamping center position can be achieved, the adjustment precision is high, and adjustment is convenient. The clamp is particularly suitable for clamping workpieces of numerical control machining equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal processing equipment, and in particular relates to a self-centering vise with adjustable center. Background Technology

[0002] A bench vise is a general-purpose clamping tool used to hold workpieces. It is mounted on a workbench to securely hold the workpiece during machining.

[0003] Currently, most vises used for clamping mechanical parts are self-centering vises, which have the problem of not being able to adjust the center position. The machining center position can only be adjusted by moving the slide to the left or by moving the power spindle left and right. In addition, they have high requirements for equipment, poor flexibility, and are cumbersome to operate.

[0004] Therefore, there is a need for a self-centering vise that can overcome the shortcomings of existing technologies, has a finely adjustable center, is used for clamping workpieces with controllable precision, and is easy to adjust. Utility Model Content

[0005] The purpose of this utility model is to provide a self-centering vise with adjustable center, including a self-centering vise body, a slide rail, a screw seat fixed in the middle of the slide rail, and a forward and reverse threaded screw connected movably, both ends of the forward and reverse threaded screw are threaded with a screw sleeve, the outer circumference of the two screw sleeves is threaded with a nut slider, both nut sliders are movably connected to the slide rail, and both are fixed with a V-block for clamping at the top;

[0006] The outer thread pitch of the screw sleeve is different from that of the inner thread pitch, and both ends of the two screw sleeves that are opposite to each other are provided with evenly distributed positioning holes. The ends of the two nut sliders are provided with screw sleeve limiting plates for positioning the positioning holes. The self-centering vise achieves center fine adjustment through the cooperation of the screw sleeve limiting plates and positioning holes.

[0007] Furthermore, a groove is provided inside the self-centering vise body, and slide rails are provided on both sides of the groove. The screw seat is fixed in the middle of the slide rails, and two nut sliders are slidably located at both ends of the groove.

[0008] Furthermore, the screw with the forward and reverse threads has an annular limiting groove recessed in the middle, located on opposite sides of the screw with the forward and reverse threads. A limiting pin is provided in the middle of the groove, and the limiting pin extends into the annular limiting groove to limit the forward and reverse threads.

[0009] Furthermore, the top of the nut slider is provided with a keyway, and the keyway is provided with a key. The V-block is positioned with the nut slide by the key and is fixed to each other by bolts.

[0010] Furthermore, the clamping surfaces of the two V-blocks are also fixed with pads.

[0011] Furthermore, the internal thread of the screw sleeve is the same as the external thread of the positive and negative thread screw, and the pitch of the external thread of the screw sleeve is the same as the pitch of the internal thread of the nut slider.

[0012] Compared with the prior art, the beneficial effects of this utility model are mainly reflected in the following: by setting the positioning hole, the screw sleeve limiting plate and the pitch difference of the internal and external threads of the screw sleeve, the self-centering vise can realize the micro-adjustment of the clamping center position. The adjustment is accurate and precise, and the adjustment is convenient. It is especially suitable for workpiece clamping of CNC machining equipment. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the self-centering vise with adjustable center according to the present invention after unfolding.

[0014] Figure 2 This is a schematic diagram showing the limiting of the length direction of the forward and reverse threaded screw in this utility model.

[0015] Figure 3 This is a schematic diagram of the assembly of the key in this utility model.

[0016] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at the middle left end.

[0017] The components include: 1. Self-centering vise body; 2. Left nut slider; 3. Right nut slider; 4. Threaded screw (both positive and negative threads); 5. Screw seat; 6. Limiting pin; 7. Key; 8. V-block; 9. Washer plate; 10. Left threaded sleeve; 11. Right threaded sleeve; 12. Threaded sleeve limiting plate; 13. Positioning hole; 14. Annular limiting groove. Detailed Implementation

[0018] The following is a more detailed description of a self-centering vise with adjustable center according to the present invention, with reference to the schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0019] like Figure 1-4 As shown, a self-centering vise with adjustable center includes a self-centering vise body 1, a left nut slider 2, a right nut slider 3, a forward and reverse threaded screw 4, a screw seat 5, a limiting pin 6, a key 7, a V-block 8, a pad 9, a left threaded sleeve 10, and a right threaded sleeve 11.

[0020] refer to Figure 2A groove is provided on the upper surface of the self-centering vise body 1, extending inward from the left end face to the right end face. Slide rails are provided on opposite sides of the groove. The screw seat 5 is fixed here with bolts. The threaded screw 4 is located inside the groove and fixed by the screw seat 5. Specifically, the screw seat 5 has two limiting pins 6 inside, fixed to the bottom of the groove and located on both sides of the threaded screw 4. An annular limiting groove 14 is recessed in the middle of the threaded screw 4. The limiting pins 6 on both sides of the threaded screw 4 extend into the annular limiting groove 14, thereby limiting the length of the threaded screw 4.

[0021] Located at both ends of the groove, the left nut slider 2 and the right nut slider are slidably connected to the slide rail, and the left threaded sleeve 10 and the right threaded sleeve 11 are threadedly connected inside the left nut slider 2 and the right nut slider 3, respectively. The left threaded sleeve 10 and the right threaded sleeve 11 are threadedly connected to the external threads at both ends of the positive and negative thread screw 4, respectively.

[0022] refer to Figure 3 Keyways are provided at the top of both the left nut slider 2 and the right nut slider 3. Keys 7 are placed in the keyways for positioning. With the setting of keys 7, the two V-blocks 8 can be accurately positioned on the upper surfaces of the left nut slider 2 and the right nut slider 3.

[0023] The two V-blocks 8 are positioned opposite each other as clamping ports. The four pads 9 are detachably fixed to the four inclined surfaces to prevent the workpiece from directly contacting the V-blocks 8, which would cause wear and increase friction.

[0024] like Figure 4 As shown, the self-centering vise of this utility model achieves fine adjustment of the vise's clamping center through the left threaded sleeve 10, right threaded sleeve 11, left nut slider 2, and right nut slider 3 in conjunction with the positive and negative threaded screws 4 and the slide rail. The specific structure is as follows:

[0025] There is a pitch difference between the inner and outer thread pitches of the left and right threaded sleeves 10 and 11, which can be set to 0.1 mm. The inner threads of the left and right threaded sleeves 10 and 11 are the same as the outer threads at both ends of the screw rod 4, respectively. The pitch of the outer threads of the left and right threaded sleeves 11 is the same as the pitch of the inner threads of the left nut slider 2 and the right nut slider 3, respectively. When the screw rod is rotated in the locked state, the two nut sliders slide synchronously, and the clamping center position of the V-block 8 remains unchanged.

[0026] After loosening any one of the threaded sleeves and rotating it by an angle, let the rotation angle be θ. Then, the nut slider on the loosened side will move a corresponding distance X, where X = 0.1 * θ / 360. We have evenly distributed positioning holes 13 on the left side of the left threaded sleeve 10 and the right side of the right threaded sleeve 11, arranged in a circular array. We also fix threaded sleeve limiting plates 12 that mate with the positioning holes 13 on the left side of the left nut slider 2 and the right side of the right nut slider 3. These limiting plates 12 also have positioning holes, which can connect with the positioning holes 13 on the side of the nut slider after any rotation angle, thus achieving positioning. This invention, through the setting of these positioning holes, can achieve fine-tuning with an accuracy within 0.005 mm.

[0027] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A self-centering vise with adjustable center, characterized in that, The vise includes a self-centering vise body, which is provided with a slide rail. A screw seat is fixed in the middle of the slide rail and is movably connected to a positive and negative thread screw. Both ends of the positive and negative thread screw are threadedly connected to a screw sleeve. Nut sliders are threadedly connected to the outer circumference of the two screw sleeves. Both nut sliders are movably connected to the slide rail and are fixed at the top with a V-block for clamping. The outer thread pitch of the screw sleeve is different from that of the inner thread pitch, and both ends of the two screw sleeves that are opposite to each other are provided with evenly distributed positioning holes. The ends of the two nut sliders are provided with screw sleeve limiting plates for positioning the positioning holes. The self-centering vise achieves center fine adjustment through the cooperation of the screw sleeve limiting plates and positioning holes.

2. The self-centering vise with adjustable center according to claim 1, characterized in that, The self-centering vise body has a groove running through it, and slide rails are provided on both sides of the groove. The screw seat is fixed to the middle of the slide rails, and two nut sliders are slidably disposed at both ends of the groove.

3. The self-centering vise with adjustable center according to claim 2, characterized in that, The screw with the forward and reverse threads has an annular limiting groove recessed in the middle, located on opposite sides of the screw. A limiting pin is provided in the middle of the groove, and the limiting pin extends into the annular limiting groove to limit the forward and reverse threads.

4. The self-centering vise with adjustable center according to claim 1, characterized in that, The top of the nut slider is provided with a keyway, and the keyway is provided with a key. The V-block is positioned with the nut slider by means of the key.

5. The self-centering vise with adjustable center according to claim 1, characterized in that, The clamping surfaces of the two V-blocks are also fixed with pads.

6. The self-centering vise with adjustable center according to claim 1, characterized in that, The internal thread of the sleeve is the same as the external thread of the screw rod, and the pitch of the external thread of the sleeve is the same as the pitch of the internal thread of the nut slider.

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