CN214162098U

CN214162098U - Welding fork tool clamp

Info

Publication number: CN214162098U
Application number: CN202022217229.4U
Authority: CN
Inventors: 林绿高
Original assignee: Zhejiang Chr Intelligent Equipment Co ltd
Current assignee: Zhejiang Chr Intelligent Equipment Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-09-10
Anticipated expiration: 2030-09-30

Abstract

The utility model relates to a welding fork frock clamp, include: the clamp fixing seat is used for placing the welding fork and positioning the shaft end part of the welding fork; the pressing block can act on the end part of the fork arm of the welding fork so as to press the welding fork on the fixture fixing seat; the welding fork welding fixture is characterized by further comprising a center hole detection assembly, the center hole detection assembly comprises a detection needle and an identification device, the detection needle is movably arranged on the pressing block along the axial direction of the detection needle, the first end of the detection needle faces the end portion of the fork arm of the welding fork and can stretch into the center hole formed in the machined welding fork, and the identification device is arranged on the pressing block and can identify whether the first end of the detection needle stretches into the center hole or not. The detection procedure of the central hole of the welding fork workpiece in the prior art is omitted, the machining process of the welding fork workpiece and the detection process of the central hole can be realized by clamping once, the machining period of the welding fork is effectively shortened, and the machining efficiency of the welding fork is improved.

Description

Welding fork tool clamp

Technical Field

The utility model relates to a welding fork processing technology field especially relates to a welding fork frock clamp.

Background

The welding fork workpiece is a common transmission accessory for automobiles. The welding fork mainly comprises a U-shaped fork body on the upper portion and a connecting column on the lower portion, the U-shaped fork body comprises two vertical fork arms which are symmetrically arranged, and transverse through holes (lug holes) are formed in the upper end portions of the two fork arms and used for fixing the cross shaft assembly. Welding forks typically require a machine tool to machine a jump ring slot at the location of its transverse through hole and a central hole in the middle of the U-shaped fork body. In the process of machining a welding fork by an existing machine tool, a machining tool of the existing machine tool is usually positioned by a shaft shoulder or an expansion sleeve, so that the existing machine tool is inconvenient to install, inaccurate in positioning and difficult to ensure machining precision.

In order to solve the technical problem, chinese utility model patent with application number CN201320574190.9 (with the publication number CN 203459862U) discloses "a frock clamp for processing clamp spring grooves of two ear holes of welding yoke and shaft yoke", including the base and two workpiece positioning blocks fixed on the base, two workpiece positioning blocks are first V-shaped seat and second V-shaped seat respectively, the second V-shaped seat is used for positioning the ear hole end of the workpiece, the first V-shaped seat is used for positioning the other end of the workpiece, the top of the second V-shaped seat is equipped with the upper pressing block matched with the second V-shaped seat, the distance between the first V-shaped seat and the second V-shaped seat matches with the length of the workpiece, the width of the upper pressing block is smaller than the distance between the two ear holes of the workpiece, the frock clamp further comprises a mandrel passing through the two ear holes of the workpiece, the mandrel length matches with the distance between the two ear holes of the workpiece, and the middle part of the mandrel is pressed by the upper pressing block. The tool clamp is convenient to clamp, accurate and reliable in positioning, and can be specially used for machining clamp spring grooves of two lug holes of a welding fork and a shaft fork.

However, after the whole processing process of the welding fork is completed, it is usually necessary to detect whether the central hole in the middle of the U-shaped fork body is processed, and thus the welding fork needs to be clamped and fixed again to detect the central hole, which inevitably prolongs the processing cycle of the welding fork, and causes the processing efficiency of the welding fork to be low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the current situation to prior art provides a welding fork frock clamp, and this welding fork frock clamp can realize the detection to the centre bore of welding fork at the clamping in-process to shorten the processing cycle of welding fork, improved the machining efficiency of welding fork.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a welding fork frock clamp includes:

the clamp fixing seat is used for placing the welding fork and positioning the shaft end part of the welding fork;

the pressing block can act on the end part of the fork arm of the welding fork so as to press the welding fork on the fixture fixing seat;

the welding fork is characterized by further comprising a center hole detection assembly, wherein the center hole detection assembly comprises a detection needle and an identification device, the detection needle is movably arranged on the pressing block along the axial direction of the detection needle, the first end of the detection needle faces towards the end part of the fork arm of the welding fork and can stretch into the center hole formed in the machined welding fork, and the identification device is arranged on the pressing block and can identify whether the first end of the detection needle stretches into the center hole or not.

In order to better apply pressure to the end part of the yoke arm of the welding fork and increase the clamping firmness of the welding fork, the welding fork fixture further comprises an auxiliary core rod, the auxiliary core rod correspondingly penetrates through two lug holes in the end part of the yoke arm of the welding fork, the pressing block acts on the auxiliary core rod to press the welding fork on the fixture fixing seat, and a through hole for a detection needle to penetrate through is formed in the first end, corresponding to the detection needle, of the auxiliary core rod.

As an improvement, the pressing block is located above the fixture fixing seat, so that the welding fork is pressed on the fixture fixing seat from top to bottom, the pressing block is provided with a vertically arranged movable hole, the detection pin is movably constrained in the movable hole along the axial direction of the detection pin, and the detection pin always moves downwards under the action of gravity of the detection pin. When the compact heap lifts up, the detection needle can reset to initial position automatically downwards under self action of gravity, therefore, need not additionally set up resetting means, has simplified the structure of compact heap, has saved manufacturing cost.

In order to assemble the detection needle on the pressing block, a stop block is arranged at the lower port of the movable hole, the stop block and the inner wall of the movable hole jointly form a movable cavity, the detection needle is arranged on the stop block in a penetrating mode, a guide column which is coaxial with the detection needle is arranged at the second end of the detection needle, and the guide column is limited in the movable cavity.

As a refinement, the identification means is a proximity switch correspondingly disposed in the active chamber, the proximity switch being in signal communication with a control system. When the proximity switch identifies that the central hole of the welding fork is not machined, the signal can be transmitted to the control system to give an alarm, the workpiece is rejected, and when the proximity switch identifies that the central hole of the welding fork is machined, the signal is also transmitted to the control system to perform subsequent machining actions.

In order to better apply pressure to the auxiliary core rod and avoid the problem of shaking of the auxiliary core rod, the pressing block is provided with a first V-shaped groove, and an opening of the first V-shaped groove faces the auxiliary core rod.

In order to drive the pressing block to approach or depart from the fixture fixing seat so as to realize the pressing and loosening actions of the welding fork workpiece,

further comprising:

the supporting frame is arranged on the clamp fixing seat and is provided with a guide rail;

and the action end of the driving device is connected with the pressing block so as to drive the pressing block to reciprocate along the guide rail.

As an improvement, the driving device is a motor, an air cylinder or an oil cylinder.

In order to realize firm clamping and accurate positioning of the welding fork and further enable a detection needle to smoothly and accurately detect a center hole of a welding fork workpiece, the clamp fixing seat is further provided with a clamping device for clamping the shaft end part of the welding fork, the clamping device comprises a first clamping arm and a second clamping arm which can correspond to the first clamping arm and the second clamping arm which are clamped on two sides of the shaft end part of the welding fork, and the first clamping arm and the second clamping arm are respectively provided with a second V-shaped groove which is matched with the shaft end part of the welding fork.

In order to facilitate an operator to place a welding fork workpiece on the fixture fixing seat and take the welding fork workpiece off the fixture fixing seat, the clamping device further comprises a supporting seat, a pull rod and a reset spring, the pull rod is movably arranged on the supporting seat in a penetrating mode along the axial direction of the pull rod, the first end of the pull rod is connected with the first clamping arm, the second end of the pull rod is provided with a limiting convex part which can be correspondingly abutted to the supporting seat, the reset spring is sleeved on the pull rod and is arranged between the supporting seat and the first clamping arm, and therefore the first clamping arm always tends to be away from the supporting seat.

Compared with the prior art, the utility model has the advantages that: when the welding fork is processed (such as processing a clamp spring groove of an ear hole of a welding fork workpiece), the welding fork can be clamped and fixed by the welding fork tool clamp, the welding fork tool clamp is provided with a central hole detection assembly which specifically comprises a detection needle and an identification device, wherein, the detection needle is movably arranged on the pressing block along the self axial direction, and in the clamping process, if the welding fork workpiece does not process the central hole in the previous working procedure, the detection needle can be propped to have larger axial displacement, if the welding fork workpiece has finished machining the central hole in the previous process, the first end of the detection needle can extend into the machined central hole of the welding fork, therefore, the axial displacement of the detection needle is different, and the recognition device can recognize the two states of the detection needle, so that whether the central hole is machined on the welding fork is detected. The structural design of the welding fork tool clamp omits the detection procedure of the central hole of the welding fork workpiece in the prior art, the machining process of the welding fork workpiece and the detection process of the central hole can be realized by one-time clamping, the machining period of the welding fork is effectively shortened, and the machining efficiency of the welding fork is improved.

Drawings

Fig. 1 is a schematic perspective view of a welding fork workpiece according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of another angular state of the welding fork workpiece according to the embodiment of the present invention;

fig. 3 is a schematic perspective view of the embodiment of the present invention (without the welding fork work piece placed);

fig. 4 is a schematic perspective view of the embodiment of the present invention (with a welding fork workpiece placed);

FIG. 5 is a side view of FIG. 3;

fig. 6 is a cross-sectional view of an embodiment of the present invention (with a weld fork workpiece positioned);

FIG. 7 is an enlarged view taken at A in FIG. 6 (the weld fork workpiece has a central hole);

FIG. 8 is an enlarged view taken at A in FIG. 6 (the weld fork workpiece has not been machined with a central hole);

fig. 9 is a schematic perspective view of a clamping device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The welding fork 10 workpiece is a transmission accessory commonly used in automobiles, and as shown in fig. 1 and 2, a welding fork 10 workpiece structure is shown. The welding fork 10 is mainly composed of a fork arm end 11 at the upper part and a shaft end 12 (cylinder) at the lower part, the fork arm end 11 comprises two symmetrical vertical fork arms, and the upper ends of the two fork arms are both provided with ear holes 110 for fixing the cross shaft assembly. The machining process of the welding yoke 10 generally includes boring on the inner wall of the ear hole 110 thereof, spot facing of the outer end face of the ear hole 110, cutting of the circlip groove 111 on the inner wall of the ear hole 110, and machining of the center hole 112 formed at the intermediate position of the yoke arm end 11.

Referring to fig. 3-9, a welding fork tooling fixture comprises a fixture fixing seat 21, a pressing block 22, a supporting frame 41, a driving device 43 and a central hole 112 for detecting assembly price. The clamp fixing seat 21 is used for placing the welding fork 10, and the clamp fixing seat 21 is provided with a clamping device which can clamp and fix the shaft end part 12 of the welding fork 10 placed on the clamp fixing seat 21. On anchor clamps fixing base 21 was located to support frame 41, specifically was a riser structure, was equipped with vertical extension's guide rail 42 on the riser, and compact heap 22 is through a slider sliding connection on this guide rail 42. Specifically, the action end of the driving device 43 is connected to the pressing block 22, and when the driving device 43 acts, the pressing block 22 is driven to reciprocate up and down along the guide rail 42.

The driving device 43 may be selected from a motor, a cylinder, or a cylinder, and is preferably a cylinder in the present embodiment.

Referring to fig. 4 and 6, in the present embodiment, the welding fork 10 to be processed is vertically placed on the fixture fixing seat 21, wherein the pressing block 22 can act on an auxiliary core rod 23 from top to bottom, and both ends of the auxiliary core rod 23 act on the yoke end 11 of the welding fork 10, so as to press the welding fork 10 on the fixture fixing seat 21.

Referring to fig. 4 and 5, in order to apply a better pressure to the yoke end 11 of the welding yoke 10 and increase the clamping reliability of the welding yoke 10, when the welding yoke 10 is clamped and fixed, an auxiliary core rod 23 may be inserted into the two ear holes 110 of the yoke end 11 of the welding yoke 10, and when the pressing block 22 is pressed down, it can act on the auxiliary core rod 23 to press the welding yoke 10 against the clamp fixing seat 21. The outer diameter of the separate part of the auxiliary mandrel 23 is adapted to the size of the ear opening 110 of the welding fork 10. Moreover, the length of the auxiliary core rod 23 is smaller than the distance between the two ear holes 110, that is, the two ends of the auxiliary core rod 23 are hidden in the two ear holes 110 of the welding fork 10, so as to avoid interference caused by subsequent processing of the jump ring groove 111 in the ear holes 110. On the other hand, the bottom of the pressing block 22 is provided with a first V-shaped groove 222, and the opening of the first V-shaped groove 222 faces the auxiliary core rod 23, so that the auxiliary core rod 23 is better pressed and positioned, and the problem of shaking of the auxiliary core rod 23 is avoided. The auxiliary core rod 23 further has a through hole 230 for passing the detection needle 31 therethrough at a position corresponding to a first end of the detection needle 31 described below, as shown in detail in fig. 7.

Referring to fig. 9, the clamp holder 21 is provided with a clamping device which can be used to clamp the shaft end 12 of the welding fork 10. The clamping device comprises a first clamping arm 51, a second clamping arm 52, a supporting seat 54, a pull rod 55 and a return spring 56 which can be correspondingly clamped at two sides of the shaft end 12 of the welding fork 10. In this embodiment, the second clamping arm 52 is located at the rear side of the clamp fixing seat 21 and fixed relative to the clamp fixing seat 21, and is specifically disposed close to the supporting frame 41, while the first clamping arm 51 is located at the front side of the clamp fixing seat 21 and is specifically disposed away from the supporting frame 41, and the first clamping arm 51 and the second clamping arm 52 both have a second V-shaped groove 53, and the second V-shaped groove 53 is adapted to the shaft end 12 of the welding fork 10.

With reference to fig. 9, in order to facilitate the operator to place the workpiece of the welding fork 10 on the fixture fixing seat 21 and take the workpiece off from the fixture fixing seat 21, the fixture fixing seat 21 has a sliding slot 210 extending forward and backward, and the first clamping arm 51 is slidably disposed in the sliding slot 210. The supporting seat 54 is fixed at the front position of the fixture fixing seat 21, and is specifically a square block structure. The pull rod 55 is movably inserted into the supporting seat 54 along its axial direction, wherein a first end of the pull rod 55 is connected to the first clamping arm 51, and a second end of the pull rod 55 has a limit protrusion 550 capable of correspondingly abutting against the supporting seat 54. The return spring 56 is sleeved on the pull rod 55 and is disposed between the support 54 and the first clamping arm 51, so that the first clamping arm 51 always tends to be away from the support 54. When an operator places the welding fork 10, the operator can directly pull the pull rod 55 forward to open the first clamping arm 51 relative to the second clamping arm 52, and after the welding fork 10 is placed in place, the pull rod 55 is released, and the pull rod 55 moves forward under the action of the return spring 56, so that the first clamping arm 51 presses the shaft end 12 of the welding fork 10.

Referring to fig. 7 and 8, the central hole 112 detection assembly includes a detection pin 31 and an identification device. The detection pin 31 is movably arranged on the pressing block 22 along the axial direction, wherein a first end of the detection pin 31 faces the yoke end 11 of the welding fork 10 and can penetrate through the through hole 230 of the auxiliary core rod 23 and extend into the processed central hole 112 of the welding fork 10. Specifically, the pressing block 22 has a vertically arranged movable hole 220, and the detection needle 31 is movably constrained in the movable hole 220 along the axial direction thereof, and always moves downwards under the action of the gravity thereof. In order to assemble the detection needle 31 on the pressing block 22, a stop 24 is arranged at the lower port of the movable hole 220, the stop 24 and the inner wall of the movable hole 220 together form a movable cavity 221, the detection needle 31 is arranged on the stop 24 in a penetrating way, the second end of the detection needle 31 is provided with a guide column 32 which is coaxially arranged with the detection needle 31, the outer diameter of the guide column 32 is larger than the diameter of the detection needle 31, and the guide column can be limited in the movable cavity 221. During the clamping process, if the workpiece of the welding fork 10 is not machined in the central hole 112 in the previous working procedure, the detection pin 31 is pushed upwards to have a large axial displacement during the downward movement of the pressing block 22, which is detailed in fig. 8; if the workpiece of the welding fork 10 has finished machining the central hole 112 in the previous step, the first end of the detection pin 31 can extend into the machined central hole 112 of the welding fork 10, whereby the detection pin 31 has a relatively small axial displacement or no axial displacement, as shown in detail in fig. 7. The recognition device described below can recognize the position state of the detection pin 31, and thereby detect whether the center hole 112 is machined in the workpiece of the welding fork 10. On the other hand, when the pressing block 22 is lifted, the detection pin 31 can automatically reset downwards to the initial position under the action of self gravity, so that a reset device is not required to be additionally arranged, the structure of the pressing block 22 is simplified, and the production cost is saved.

Referring to fig. 5 to 8, the recognition means is provided on the pressing block 22, and can recognize whether the first end of the detection pin 31 is inserted into the central hole 112. In this embodiment, the identification means may be selected to correspond to a proximity switch 33 disposed in the active chamber 221, the proximity switch 33 being in signal communication with the control system. When the proximity switch 33 recognizes that the center hole 112 of the welding fork 10 has not been machined, a signal may be sent to the control system to alert the control system to remove the workpiece and when the proximity switch 33 recognizes that the center hole 112 of the welding fork 10 has been machined, a signal may be sent to the control system to perform a subsequent machining operation.

This embodiment welding fork frock clamp's advantage: the welding fork 10 can be clamped and fixed by the welding fork tool clamp when being processed (such as processing the clamp spring groove 111 of the ear hole 110 of the welding fork 10 workpiece), the welding fork tool clamp is provided with a detection assembly of a central hole 112, and particularly comprises a detection needle 31 and an identification device, wherein, the detecting needle 31 is movably arranged on the pressing block 22 along the self axial direction, and in the process of clamping, if the workpiece of the welding fork 10 has not been machined into the central bore 112 in the previous step, the sensing pin 31 will be held against a greater axial displacement, if the workpiece of the welding fork 10 has finished machining the central hole 112 in the preceding step, the first end of the detection pin 31 can project into the finished central hole 112 of the welding fork 10, whereby the axial displacement of the detection pin 31 is different, the identification device can identify the two states of the detection pin 31, thereby detecting whether the central hole 112 is machined on the welding fork 10. The structural design of the welding fork tool clamp omits the detection procedure of the central hole 112 of the welding fork 10 workpiece in the prior art, the processing process of the welding fork 10 workpiece and the detection process of the central hole 112 can be realized by one-time clamping, the processing period of the welding fork 10 is effectively shortened, and the processing efficiency of the welding fork 10 is improved.

Claims

1. A welding fork frock clamp includes:

the clamp fixing seat (21) is used for placing the welding fork (10) and positioning the shaft end part (12) of the welding fork (10);

the pressing block (22) can act on the fork arm end part (11) of the welding fork (10) to press the welding fork (10) on the clamp fixing seat (21);

the method is characterized in that: still include centre bore (112) determine module, centre bore (112) determine module is including detecting needle (31) and recognition device, detect needle (31) set up along self axial activity compact heap (22) on, the first end orientation of detecting needle (31) yoke tip (11) of welding fork (10) to can stretch into in the centre bore (112) that welding fork (10) have been processed, recognition device locates compact heap (22) on, can be right the state of whether stretching into in above-mentioned centre bore (112) of first end of detecting needle (31) is discerned.

2. The welding fork tooling fixture of claim 1, wherein: the welding fork is characterized by further comprising an auxiliary core rod (23), wherein the auxiliary core rod (23) correspondingly penetrates through two ear holes (110) of the fork arm end part (11) of the welding fork (10), the pressing block (22) acts on the auxiliary core rod (23) so as to press the welding fork (10) on the clamp fixing seat (21), and a through hole (230) for the detection needle (31) to penetrate through is formed in the first end, corresponding to the detection needle (31), of the auxiliary core rod (23).

3. The weld fork tooling fixture of claim 2, wherein: the clamp comprises a clamp fixing seat (21), a pressing block (22) and a detection needle (31), wherein the pressing block (22) is located above the clamp fixing seat (21), so that the welding fork (10) is pressed on the clamp fixing seat (21) from top to bottom, a movable hole (220) is vertically formed in the pressing block (22), the detection needle is movably restricted in the movable hole (220) along the axial direction of the detection needle, and the detection needle always moves downwards under the action of gravity.

4. The weld fork tooling fixture of claim 3, wherein: the lower port position of activity hole (220) is provided with dog (24), and this dog (24) with the inner wall of activity hole (220) constitutes a activity chamber (221) jointly, detection needle (31) wear to establish on dog (24), the second end of detection needle (31) has guide post (32) with detection needle (31) coaxial setting, this guide post (32) spacing be in activity chamber (221).

5. The weld fork tooling fixture of claim 4, wherein: the identification device is a proximity switch (33) correspondingly arranged in the movable cavity (221), and the proximity switch (33) is in signal communication with a control system.

6. The weld fork tooling fixture of claim 2, wherein: the pressing block (22) is provided with a first V-shaped groove (222), and the opening of the first V-shaped groove (222) faces the auxiliary core rod (23).

7. The weld fork tooling fixture of any one of claims 1-6, further comprising:

the supporting frame (41) is arranged on the clamp fixing seat (21), and a guide rail (42) is arranged on the supporting frame (41);

and the action end of the driving device (43) is connected with the pressing block (22) so as to drive the pressing block (22) to reciprocate along the guide rail (42).

8. The weld fork tooling fixture of claim 7, wherein: the driving device (43) is a motor, an air cylinder or an oil cylinder.

9. The weld fork tooling fixture of any one of claims 1-6, wherein: still be equipped with on anchor clamps fixing base (21) and be used for right the axle head portion (12) of welding fork (10) carry out the clamping device who presss from both sides tightly, clamping device is including first arm lock (51) and second arm lock (52) that can correspond the centre gripping in axle head portion (12) both sides of welding fork (10), all have second V type groove (53) on first arm lock (51) and second arm lock (52), this second V type groove (53) with axle head portion (12) looks adaptation of welding fork (10).

10. The weld fork tooling fixture of claim 9, wherein: clamping device still includes supporting seat (54), pull rod (55) and reset spring (56), pull rod (55) wear to establish along self axial activity supporting seat (54) on, the first end of pull rod (55) with first arm lock (51) are connected, the second end of pull rod (55) has and to correspond to support spacing convex part (550) on supporting seat (54), the reset spring cover is established pull rod (55) on and locate between supporting seat (54) and first arm lock (51), thereby make first arm lock (51) have all the time and keep away from the trend of supporting seat (54).